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Opt Lett. 2008 Jul 15;33(14):1593-5.

Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy.

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  • 1Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.


Rapid voltage-controlled phase modulation of cw terahertz (THz) radiation is demonstrated. By transmitting an infrared beam through a lithium niobate phase modulator the phase of the THz radiation, which is generated by the photomixing of two infrared beams, can be directly modulated through a 2pi phase shift. The 100 kHz modulation rate that is demonstrated with this technique is approximately 3 orders of magnitude faster than what can be achieved by mechanical scanning.

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